关于弯曲航道上桥梁通航净宽的探讨孙建军1,张兵,马全党?(1.山东省交通规划设计院集团有限公司,山东济南250101;2.武汉理工大学,湖北武汉430063)摘要:在弯曲航道上建桥,为保障船舶航行安全,应适当加大桥梁通航孔跨度,同时要考虑节省工程投资,因此,合理确定通航净宽尺度至关重要。针对现行规范弯道处桥梁通航净宽计算取值困难的问题,结合徒骇河某铁路桥实例,采用平面二维水流数值模拟及船舶操纵模拟试验方法,直接确定了桥墩紊流宽度和船舶航迹带宽度,结合规范中通航净宽的计算方法,得到了较为合理的通航净宽值,并与公式结果进行了对比,对航道和桥梁设计提供了科学参考依据。关键词:弯道航道;通航净宽;航迹带;紊流宽度中图分类号:U442.57文献标识码:ADiscussionaboutnavigableclearwidthofbridgeonbendnavigableSUNJianjun',ZHANGBing,MAQuandang?(1.ShandongProvincialCommunicationsPlanningandDesignInstituteGroupCo.,Ltd.,ShandongJinan250101China;2.WuhanUniversityofAbstract:Tobuildabridgeonbendwaterway,inordertoensurethenavigationsafetyofships,thenavigablewidthofthebridgeshouldbeappropriatelyincreased,andatthesametime,theprojectinvestmentshouldbesaved.Itisimportanttoreasonablydeterminethenavigableclearwidth.Inviewofthedifficultyincalculatingthenavigableclearwidthofthebridgeonbendwaterwayinthecurrentcode,takeingarailwaybridgeonTuhaiRiverasforexample,theturbulencewidthandtheship'strackwidtharedirectlydeterminedbyusingthetwo-dimensional收稿日期:2023-03-28作者简介:孙建军(1990一),男,山东潍坊人,硕士研究生,工程师,研究方向为港口航道工程。-144-flownumericalsimulationandnumericalsimulationofshipmaneuveringmotion,combinedwiththecalculationmethodofthenavigableclearwidthinthecode.Themorereasonablenavigableclearwidthisobtainedbycomparingwiththeformularesults.Itprovidesascientificreferenceforthedesignofwaterwayandbridge.Keywords:bendwaterway;navigableclearwidth;trackwidth;turbulencewidth0引言近年来,跨越通航河流的各种过河建筑物日益增多,部分跨河桥梁受到两岸接线、路网布局、征地拆迁等因素制约,只能选择在弯曲河段跨河。《内河通航标准》(GB50139—2014)【11中规定在弯道处兴建水上过河建筑物时,应加大通航孔跨度,但对...